Audi RS6 OBDII Testing

Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-80 just a test. Final control diagnosis

Note:

Final control diagnosis can only be performed with the engine stopped and the ignition switched on.

During final control diagnosis the individual control elements (except injectors) are actuated for approx. 1 minute or until key is pressed to select next control element. Advanced Search Search The control elements are checked acoustically or by means of touch. Version: 2.5r01sp0003

Final control diagnosis is terminated if the next step is not selected after an actuation time of approximately 1 minute, or if the engine is started or an engine speed pulse is detected.

Prior to restarting the final control diagnosis, the engine must be started and the ignition switched off and on again. Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-81

The final control diagnosis function actuates the following components in the stated sequence:

1. Evaporative Emissions (EVAP) canister purge regulator valve -N80- (fuel tank breather valve)

2. Secondary air injection solenoid valve -N112-

3. Secondary air injection pump relay -J299-

4. Wastegate bypass regulator valve

-N75-

5. Valve -2- for camshaft adjustment -N208-

6. Leak Detection Pump -V144-

7. Recirculating valve for turbocharger -N249- Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

8. Right Electro-Hydraulic engine mount solenoid valve -N145-

(on right in direction of travel)

9. Left Electro-Hydraulic engine mount solenoid valve -N144-

(on left in direction of travel) Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-82

10. Valve -1- for camshaft adjustment -N205-

11. Vacuum pump for brake system

12. Fuel pump 2 relay -J49-

(refer to note Page 01-95 )

13. Coolant fan actuation 2

14. Coolant fan actuation 1

15. Injector, cyl. 1 -N30-

16. Injector, cyl. 5 -N83-

17. Injector, cyl. 4 -N33-

18. Injector, cyl. 8 -N86-

19. Injector, cyl. 6 -N84- Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

20. Injector, cyl. 3 -N32-

21. Injector, cyl. 7 -N85-

22. Injector, cyl. 2 -N31- Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-83

Locations of control elements Page 24-5

Requirement

Fuses for engine electronics OK

Electrical Wiring Diagrams, Troubleshooting & Component Locations

Work sequence

- Connect vehicle diagnostic, testing and information system VAS 5051 and select vehicle system "01 - Engine electronics" from list. Ignition must be on. Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

Indicated on VAS 5051:

- From list -1- select diagnostic function "03 - Final control diagnosis". Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-84

Actuation of EVAP canister purge regulator valve - N80- (fuel tank breather valve)

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 1 - EVAP caniste purge regulator valve - N80-

- Touch key.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted This valve is actuated intermittently (clicks) for approximately 1 minute unless next control element is selected beforehand by touching key.

Note:

The two fuel pumps must run during the actuation period. The flow noise is clearly audible at the fuel pressure regulator. If the fuel pumps do not run, check Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

actuation Page 24-86 .

If valve is not actuated (does not click):

- Check EVAP caniste purge regulator valve -N80- Page 24-192 . Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-85

Actuation of Secondary air injection solenoid valve - N112-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 2 - Secondary air injection solenoid valve - N112-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted This valve is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

If valve is not actuated (does not click): Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

- Check Secondary air injection solenoid valve - N112-: Repair Manual, 4.2 Liter V8 5V BiTurbo Engine Mechanical, Engine Code(s): BCY, Repair Group 26 Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-86

Actuation of Secondary air injection pump relay - J299-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 3 - Secondary air injection pump relay - J299-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

Secondary air injection pump relay -J299- (in relay carrier in plenum chamber electronics box, refer to wiring diagram) intermittently switches secondary air injection pump motor - V101- on and off for approx. 1 minute if next control element is not selected beforehand by touching key.

If secondary air injection pump motor does not run intermittently:

- Check Secondary air injection pump relay - J299-: Repair Manual, 4.2 Liter V8 5V BiTurbo Engine Mechanical, Engine Code(s): BCY, Repair Group 26 Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-87

Actuation of Wastegate bypass regulator valve - N75-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 4 - Wastegate bypass regulator valve - N75

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted This valve is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

01-88

Actuation of Valve -2- for camshaft adjustment - N208-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 5 - Valve -2- for camshaft adjustment - N208-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted This valve is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

- Check camshaft adjustment valve: Repair Manual, 4.2 Liter V8 5V BiTurbo Engine Mechanical, Engine Code(s): BCY, Repair Group 15 Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-89

Diagnosis of Fuel System Leak Detection Pump (LDP) -V144- actuation

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 6 - Leak Detection Pump (LDP) - V144-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted Switching valve in the LDP is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

- Check Leak Detection Pump (LDP - V144-: Repair Manual, Fuel Supply System, Repair Group 15 Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-90

Actuation of Recirculating valve for turbocharger - N249-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 7 - Recirculating valve for turbocharger - N249-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted This valve is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

- Check Recirculating valve for turbocharger - N249-: Repair Manual, 4.2 Liter V8 5V BiTurbo Engine Mechanical, Engine Code(s): BCY, Repair Group 21 Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-91

Actuation of Right Electro-Hydraulic engine mount solenoid valve -N145-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 8 - Right Electro-Hydraulic engine mount solenoid valve -N145-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted This valve is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

- Check engine mount solenoid valve: Repair Manual, 4.2 Liter V8 5V BiTurbo Engine Mechanical, Engine Code(s): BCY, Repair Group 10 Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-92

Actuation of Left Electro-Hydraulic engine mount solenoid valve -N144-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 9 - Left Electro-Hydraulic engine mount solenoid valve - N144

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted This valve is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

01-93

Actuation of Valve -1- for camshaft adjustment - N205-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 10 - Valve -1- for camshaft adjustment - N205-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted This valve is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

- Check camshaft adjustment valve. Repair Manual, 4.2 Liter V8 5V BiTurbo Engine Mechanical, Engine Code(s): BCY, Repair Group 15 Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-94

Actuation of vacuum pump for brake system

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 11 - Vacuum pump for brake system

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted Pump is actuated (clicks) for approx. 1 minute if key is not touched beforehand to select next control element.

- Check vacuum pump for brake system: Repair Manual, Brake System, Repair Group 47 Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-95

Actuation of Fuel pump 2 relay -J49-

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 12 - Fuel pump 2 relay - J49-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted

Note: Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

The Fuel pump relay 2 -J49- is not an actual component installed in the vehicle. The term "Fuel pump 2 relay -J49-" refers to the wiring from the engine control module to the fuel pump control module, via which the engine control module informs the fuel pump control module that full pump output is required. Refer also to Page 24-93 .

During actuation of "Fuel pump 2 relay -J49-" the engine control module switches off the actual fuel pump relay. Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-96

Actuation of coolant fan control 2

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 13 - Coolant fan actuation 2

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted Coolant fan control module 2 -J671- (at front of engine compartment) slowly increases speed of coolant fan 2 (on left in direction of travel) once to maximum unless key is pressed beforehand to select next control element. Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

If fan does not start up:

- Check coolant fan and Coolant fan control module 2 -J671-. Electrical Wiring Diagrams, Troubleshooting & Component Locations Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-97

Actuation of coolant fan control 1

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 14 - Coolant fan actuation 1

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted Coolant fan control module -J293- (at front of engine compartment, directly at fan, on right in direction of travel) slowly increases speed of coolant fan (on right in direction of travel) once to maximum unless key is pressed beforehand to select next control element. Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

If fan does not start up:

- Check coolant fan and Coolant fan control module - J293-. Electrical Wiring Diagrams, Troubleshooting & Component Locations Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-98

Actuation of injectors

Note:

Injectors are actuated in line with firing order: Cyl. 1, cyl. 5, cyl. 4, cyl. 8, cyl. 6, cyl. 3, cyl. 7, cyl. 2

The following illustrates the procedure for the first two injectors (cylinders 1 and 5). The procedure for the remaining injectors (cylinders 4, 8, 6, 3, 7 and 2) is identical.

- Touch key.

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 15 - Injector, cylinder 1 - N30-

- Touch key again. Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted Injector must click five times after touching key.

- Touch key. Audi A6 Sedan 1998-2004, Audi A6 Avant 1999-2004, Audi allroad quattro 2001-2004, Audi S6 Avan..., Audi RS6 2003-2004 - 4.2 Liter V8 5V BiTurbo Fuel Injection & Ignition, Engine Code(s): BCY

01-99

Indicated on VAS 5051:

A - Control element test waiting - Selection of next step required 16 - Injector, cylinder 5 - N83-

- Touch key again.

Indicated on VAS 5051:

A - Control element test in progress - Selection of next step permitted Injector must click five times after touching key.

Continue until all eight injectors have been actuated.

If one of the injectors is not actuated (does not click):

- Check injectors Page 24- 68 .

01-100

Indicated on VAS 5051:

A - Control element test over

- End function "03 - Final control diagnosis" by touching key.

Note:

Prior to restarting final control diagnosis, engine must be started and ignition switched off and on again.